reporting live in fremont, christie smith, nbc bay area news. new this morning, a smoke alarm in willow glen may have saved the lives of a mother and daughter. firefighters say the house went up in flames before 7:00 this morning. the home is located on mullberry lane. when crews arrived, the fire burned through the attic. firefighters say it was ultimately the smoke detecter saving lives jolting the mother and daughter out of their sleep. >> the lesson is smoke detectors. those save lives. had she not had those, the root of the fire could have extended into the house and we would have a different story. >> both women were able to escape along with the family dog. the husband had already left for work. at this hour, the cause of the fire is still under investigation. happening now. it is getting hot outside. let's look at the temperatures. what a wide range. christina.